School of Environmental Science and Engineering, Tianjin University, 300072, China; Tianjin Key Laboratory for Prevention and Control of Occupational and Environmental Hazard, Logistics University of Chinese People's Armed Police Forces, Tianjin 300162, China.
School of Environmental Science and Engineering, Tianjin University, 300072, China.
Bioresour Technol. 2016 Jul;211:451-6. doi: 10.1016/j.biortech.2016.03.113. Epub 2016 Mar 22.
Enhanced ecological floating beds were implemented to reduce nutrient quantity and improve the water quality of a eutrophic lake. The results showed that average removal efficiencies of CODCr, total nitrogen, NH3-N and total phosphorus for Canna indica L. set-up were 23.1%, 15.3%, 18.1% and 19.4% higher, respectively, than that of the setup with only substrate, and 14.2%, 12.8%, 7.9% and 11.9% higher than Iris pseudacorus L. ecological floating bed. The microbial community structure had obvious differences between devices and low similarity; bacteria were mainly attached on the fiber filling. The microbial population was abundant at the start and end of the experiment. Shannon index of samples selected ranged from 0.85 to 1.05. The sequencing results showed that fiber filling collected most uncultured bacteria species and the majority of bacteria on the plant roots were β-Proteobacteria and α-Proteobacteria. The co-dominant species attaching to the filling and plant was Nitrosomonadaceae.
强化生态浮床被应用于降低富营养化湖泊中的营养物质含量并改善水质。结果表明，与仅使用基质的生态浮床相比，美人蕉（Canna indica L.）设置的生态浮床对 CODCr、总氮、NH3-N 和总磷的平均去除率分别高出 23.1%、15.3%、18.1%和 19.4%，而与伊乐藻（Iris pseudacorus L.）生态浮床相比，分别高出 14.2%、12.8%、7.9%和 11.9%。设备之间的微生物群落结构差异明显，相似度低；细菌主要附着在纤维填充料上。在实验开始和结束时，微生物种群丰富。所选样本的 Shannon 指数范围为 0.85 至 1.05。测序结果表明，纤维填充料采集到了最多的未培养细菌种类，而植物根系上的大多数细菌为β-变形菌纲和α-变形菌纲。附着在填充料和植物上的优势种是亚硝化单胞菌科。
